Classification
100 - Philosophy & psychology
330 - Economics
333 - Economics of land & energy
3
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
3
610 - Medicine & health
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1